Coplanar waveguide bandpass filter simulation tutorial. Currently, i want to research some problem related to onsichip cpw. Simulation of cpw in hfss circuit design electrical. I can send you the link to a tutorial where everything is clearly explained. Ansys hfss tutorial simulate and analyze an example of microstrip line drew handler, jerry yang october 20, 2014. In wave port, tem mode of crosssection of the structure is calculated first, then the tem mode is used to excite. A lumped port lumped port lumped port lumped port excitation will. Fig 6 design of single patch antenna in hfss simulation results the 2x2 patch array antenna is simulated using ansoft hfss.
Each port lies across a gap between the center conductor and the pec. In hfss i used lumped port and it works fine, when i tried to do it in cst. How assign lumped port in hfss for stripline hi,everybodybecause the pcb line i will simulate located internally, so i can not use the wave port of hfss. Cpw transmission lines often cause significant grief as they are mode rich. How to set lumped port and wave port in hfss duration. The device must be connected by a section of transmission line or waveguide supporting. For transmission line problems, such as microstrip lines or cpw, in theory, the size of the. Your guide to lumped ports in the rf module comsol blog. To determine if the results are as expected, you compare hfsss sparameter calculations at each septum position on a 2d xy plot. A 50ohm acp probe is going to transfer high frequency modulation up to 30ghz to a coplanar waveguide cpw which is connected to a short cavity laser with a bondwire of 25um diameter.
Application of em simulators for extraction of line parameters 2. Analysis must include first three modes te10, te20, te01 3. Hfss running the simulation and checking the progress. A coplanar waveguide with a slot width of w 1mm and center metal strip width of s 2mm on a dielectric substrate of thickness h 1. High frequency structure simulator hfss tutorial otman mrabet enter the email address you signed up with and well email you a reset link. Cpws is to surround the structure with a metallic box as typically associated with a shielded em simulation. Does anyone have an idea about the wave port or lumped port in hfss,which should be used especially for. Hfss waveport simulation for cpw transmission line z0. Specifically, the 90 degree hybrid coupler is utilized in the handset infrastructure because it offers lowloss, high isolation, and exceptional phase and amplitude balance. Ansoft high frequency structure simulator tutorial the dipole antenna april 2004 introduction in this tutorial, a dipole antenna will be constructed and analyzed using the hfss simulation software by ansoft.
Ansys hfss tutorial simulate and analyze an example of trace and via tianjian lu 02014 tianjian lu ece 546. Basic electromagnetic field quantities and, for open boundary problems, radiated near and far fields. I want to know if the lumped port height and width effects the impedance of the structure. Optimization of packaging for pin photodiode modules. Basic electromagnetic field quantities and, for open. I want to measure the s parameters at the point of the cpw where the coupling aperture is placed above. Hfss setup for the surrounding groundring excitation. Objective this laboratory experiment provides a handson tutorial for drafting up an electromagnetic structure a stripline transmission line on a circuit board in the ansys. Therefore, proper attention to port definitions can make the difference between a successful and unsuccessful hfss analysis. A lumped port excitation will be used for the cpw feed. I have a cpw, but i dont understand how to set up the excitation.
Compute the reflection and transmission coefficients of a frequency selection surface. You can find many useful rf tutorial models in the application. It shows the electric and magnetic vector fields at. To fully utilize the exclusive features of cpw and cps, an effective interconnection between. How to define wave port in hfss forum for electronics.
The coplanar waveguide bandpass filter tutorial model presents a design that is compact in relation to its resonant frequency and provides a relatively high q factor as compared to capacitively coupled microstrip line model designs. Tools options hfss options general tab check use wizards for data input when creating new boundaries check duplicate boundariesmesh operations with geometry click ok. Hfss waveport simulation for cpw transmission line z0 mismatch so i cant quite figure out what seems to be the problem. Lumped port selection this presentation is one in a series of port tutorials, intended to help users better understand the nuances of model. Introduction coplanar waveguide cpw and coplanar stripline cps are widely used as building blocks in the design of uniplanar mmics 1. I use lumped port in in transient network analysis to replace the ones in frequency domain.
Ansys hfss wave port example for patch antenna youtube. Chapter 2 application of em simulators for extraction. Characteristic port impedances and propagation constants. Chapter 2 application of em simulators for extraction of. Read the section on impedance calculation in hfss help. Use wave ports on the front and back faces of waveguide. In the case of differential ports, the symmetry planes must bisect all terminals of the port. Ports and lumped ports for wave electromagnetics problems.
In lumped port node, you didnt select any boundary. Hfss is an interactive software package for calculating the electromagnetic behavior of a structure. Now, with a cpw i cannot draw a rectangular surface within the outer metallic strip, since there is a. There are a few different types of excitations to choose from, but the most common excitation we use in this lab is the wave port. Ansoft high frequency structure simulator v10 training seminar p411 presentation 4 lambda refinement lambda refinement is the process of refining the inital mesh such that all tetrahedra are smaller than a certain fraction of the wavelength. Pdf high frequency structure simulator hfss tutorial. There is, however, a small difference in how the ports are set up. Aug 07, 2017 this is an animation from a simulation of a coplanar waveguide cpw done in ansys high frequency structural solver hfss. More details pls refer the hfss port tutorial material. The parameters of the antenna are simulated and optimized with hfss. The ansoft high frequency structure simulator hfss is a fullwave electromagnetic em software package for calculating the electromagnetic behavior of a 3d structure. This is an animation from a simulation of a coplanar waveguide cpw done in ansys high frequency structural solver hfss.
Leftclick to define the origin of the efield vector. I read in hfss help that lumped port has some inductance in range of nh. This port configures the cpw model with a pair of subfeatures called uniform elements. I konw for a microstrip line, i can draw the 2d port rectangle that touchs the signal with one edge and the opposite edge touch the reference ground plane. Lumped port uses a uniform parallel field on patch as source to excite structure.
Lumped excitation of cpw fed slot bowtie antenna by hfss. The length of the line must be long enough such that only one propagation mode exists on the reference plane of the port. I know that placing a lumped port too close to that point i measure altered s parameters because the reactive fields generated by the aperture in a nearfield region. A lumped port located between the center conductorand the metallic box pec ground bridge lumped port fig. It shows the electric and magnetic vector fields at 10ghz as well as. Blade antenna model validation select the menu item hfss ie validation check click the close button note. The demand for a smaller 90degree hybrid coupler with a broader bandwidth is. When exciting or terminating an rf device with a specific impedance value on a location where the transverse electromagnetic tem mode is expected, the lumped port feature is useful. Does anyone have an idea about the wave port or lumped port in hfss,which should be used especially for microstrip patch antenna in uwb.
Assign lumped port edit select by name select source hfss excitations assign lumped port set the lumped port as shown in the picture. Modelling of 3d multilayer coplanar waveguide structure with incorporated wideband vertical interconnection m. The reference plane of this port is located directly at the beginning of the radiating plane. Select the menu item hfss excitations assign wave port. The antenna is cavitybacked with an annularslotfed hemispherical dielectric resonator. General navigation of software menus, toolbars, and quick keys. How do you design a port in hfss for cpw feed slot antennas. Dk is a very important property for microwave pcb design. Filter design using ansoft hfss university of waterloo.
Only the wave port and the lumped port types will be. It provides a minimum mesh density over all objects. How do you identify whether to use lumped port or wave. Any symmetry planes in your geometry must bisect the lumped port and its patch. How assign lumped port in hfss for stripline sipi exchange.
In all other lumped ports, one terminal is on the port, and the other is on the grounding material, as determined by the explicit ground reference. For microstrip, you would make a rectangle from the upper conducter line to the the ground and insert an integration line from bottom to top. The imaginary component of complex permittivity is df dissipation factor. The antenna was etched on a singlelayer coppercladding substrate, of which the material was fr4 with relative permittivity of 4. Lumped ports are used to excite or terminate passive circuits and. Introduction in this tutorial, a dipole antenna will be. Hfss tutorial dipole antenna pdf hfss tutorial dipole antenna download as pdf file.
A single bullet indicates that the procedure has only one step. Simulated and measured results for return loss, radiation. How ii should not include the lumped port s impedance in the total result. Assign wave port to it and deembed to the lumped load. I have a cpw transmission line that i am tweaking the dimensions of to try and get 50 ohm characteristic impedance. With a cps i draw a rectangular surface equal to the cross section of the cps and i set a lumped port on it, with an integration line that goes from one strip to the other orthogonally to the parallel faces of the two strips. The parameters evaluated were gain, beamwidth and return loss.
How do you identify whether to use lumped port or wave port in a microstrip patch antenna. The results should only be used as an estimate for the waveport size. How to set lumped port and wave port in hfss youtube. In order to simulate the design, we must createassign at least one port excitation. How assign lumped port in hfss for stripline, silist at freelists. You will probably want to use the zpi form and an impedance line. Both the wave port and lumped port are available for use in both the driven modal solution type and the driven terminal solution type. Rectangular waveguide hfss r objective getting started with hfss a tutorial using hfss, simulate an airfilled wr90 waveguide shown above. Lumped port reduced height lumped port narrow l can be reduced by moving the ground plane up towards the track. At an operating frequency of f o 6ghz, the freespace and guide wavelengths are. To obtain the field patterns, intrinsic impedance and wavelength for the first 4 modes. This video demonstrates the use of several modeling tricks in ansys hfss to create a microstrip design and excite it with a lumped port. The device must be connected by a section of transmission line or waveguide supporting traveling waves. How does one do this for stripline when you have two ground planes top and bottom and the conductive line in the middle.
Materials used in pcb technology generally have dk from 2 to 10 dk is dimensionless. Hfss tutorial cpw menu computing button computing scribd. About another port, i dont know the design purpose, is it a microstrip patch or something else, if it is a port, your only choice is the lumped port, you can not use the waveport. Pdf hfss training hfss training hfss training hfss.
Intuitive pcb design entry for hfss chips, packages, channels, modules, designer layouts simulated with hfss automated boundary and port setups finite dielectrics and ground supported wave and lumped gap port single ended and differential vertical and horizontal. The lumped port can be used to specify an effective impedance between two conductive boundaries within the modeling domain. Lumped port inductance in hfss ansys student community. Scribd is the worlds largest social reading and publishing site. Hu mieee department of electronic engineering, kings college london, university of london. Intuitive pcb design entry for hfss chips, packages, channels, modules, designer layouts simulated with hfss automated boundary and port setups finite dielectrics and ground supported wave and lumped gap port single ended and differential vertical and horizontal coaxial, cpw and grounded cpw. Another use of the lumped port condition is to model a small electrical element such as a resistor, capacitor, or inductor bonded onto a microwave circuit. A dielectric resonator antenna problem 12 introduction the sample problem this manual describes how to get started with hfss by guiding you through the setup, solution, and analysis of a dielectric resonator antenna. Does anyone have an idea about the wave port or lumped port in hfss,which should be used.
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